f(x)为R上增函数,且f(x²-2x)<f(3),求x
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f(x)为R上增函数,且f(x²-2x)<f(3),求x
f(x)为R上增函数,且f(x²-2x)<f(3),求x
f(x)为R上增函数,且f(x²-2x)<f(3),求x
解由f(x)为R上增函数,
且f(x^2-2x)<f(3),
知x^2-2x<3
即x^2-2x-3<0
即(x-3)(x+1)<0
解得-1<x<3